Detroit Lions head coach Jim Caldwell addresses reporters after the team's organized team activities at the Lions NFL football training camp facility in Allen Park, Mich., Wednesday, May 21, 2014. Suh is expected to be at practice all this week after missing Detroit's voluntary minicamp last month. (AP Photo/Carlos Osorio)

ALLEN PARK >> Year after disappointing year the opening of Detroit Lions’ training camp remains an optimistic time.

Expectations are always high.

This year is no different.

It has changed though with coach Jim Caldwell in charge.

“With the collection of talent in the room, the collection of coaches on the staff, the attitude of the building, the culture of the building what it is right now, what it went through in the offseason, this is the best chance since I’ve been here through five head coaches, the best chance to win right now,’’ center Dominic Raiola said on Sunday.

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The Lions’ veterans reported to training camp on Sunday. The first workout will be at 3:30 p.m. on Monday.

Caldwell slowly has changed the culture since he was hired in January to coach a team that lost six of its last seven games in 2013.

Jim Schwartz changed the culture too when he came in to turn around an 0-16 team in 2009. A major overhaul of the roster was in order then. It is not now.

So what’s the chance that the same mistakes — the fourth-quarter errors that cost the Lions game after game year after year — will be corrected?

It’s too soon to know for sure, but Caldwell has been working on that since the spring.

It goes way beyond talk, and the results so far are encouraging according to Raiola.

Accountability starts with a daily meeting.

“Every day we come in, turnovers, penalties put them up on the board and it’ll be, ‘We need to get rid of this.’ You’ll see the chart, you’ll see the chart go like this (makes downward motion), that’s where you know we’re making strides,’’ Raiola said.

“Not just saying, ‘We can’t turn the ball over.’ Not just saying, ‘We can’t commit those penalties.’ If somebody jumps offsides it’s on there. If you’re holding, he’ll point it out. We’ll watch film and he’ll point those little things out. So I think doing that, that’s a good step in fixing those things,’’ Raiola added.

He noted that no one is immune from having his errors displayed prominently.

Caldwell treats each player the same.

“He’s not afraid to single somebody out on film. He’ll put a play up there we need to fix, call somebody out. Shoot, it could be anybody,’’ Raiola said. “He discounts nobody. That was a big thing. It’s just what he expects. The little things, we don’t have to go through that any more,’’ Raiola said.

Caldwell treats his player like men who have a professional job to do and to do well.

“And you know what this guy has been around. He’s been around Peyton Manning, probably one of the best ever to play, one of the best to ever prepare to play the game,’’ Raiola said. “You have that in the back of your head. That’s kind of what he expects and what he’s used to. So right there a lot of people know kind of what this guy wants.’’

The players will hit the ground running on Monday. Little installation of the offense and defense is needed because it was all done in the offseason. It was all a part of Caldwell’s master plan.

“Our expectations are that we’re going to field a team that has the right kind of Lions’ DNA — that’s a smart, a fast and a physical team,’’ Caldwell said. “We expect you to see that on the field. A team that doesn’t hurt itself, from a mental standpoint we don’t beat ourselves. You’re going to see a team that’s highly physical that can run and cover and certainly do a great job in terms of putting points on the board because we are and should be an explosive team. We should also be a really good defensive team as well up front. Those are the things we expect.’’

It’s not just Raiola and the offense that’s excited.

“I think we’re at a point now where we’re no longer the young team in the NFL,’’ linebacker Stephen Tulloch said. “We have players who have experience, who have been to Super Bowls, have won Super Bowls and understand what it takes to get to the next step.

“I think bringing in coach Caldwell helps us achieve and see things from a different view. Players are excited about the future here and what we have in front of us,’’ Tulloch added.

Caldwell has a master plan, 37 years of coaching and two Super Bowl rings which definitely has gotten the attention of these Lions.

He’s also got a win-now mandate and a roster talented enough to make it happen.

“I’m excited about this group, so we have to fight and work and keep them healthy,’’ Caldwell said. “But yet we have to find ways to get better, we have to be tough on them and I think they’ll respond.’’